clintonopah:
okay....does this settle it?? Yes...then remark...... No then see me after class

number 6.. is yellow spot

McHenry99:
Starch can be converted to ethyl alcohol by?

A. distillation
B. fermentation
C. isomerization
D. cracking

View Explanation
Question No:1207
The ion that may be assumed to have negligible concentration in a sample of water that lathers readily with soap is?

A. Mg+
B. K+
C. CO22-
D. HCO3

View Explanation
Question No:1208
A substance S is isomorphous with another substance R. When a tiny crystals of S is added into a supersaturated solution of R?

A. S dissolves in the solution
B. crystals of R are precipitated
C. there is no observable change
D. R and S react to generate heat

View Explanation
Question No:1209
Which of the following dilute solutions has the lowest pH value?

A. Calcium trioxocarbonate (IV)
B. Sodium trioxocarbonate (IV)
C. Hydrochloric acid
D. Ethanoic acid

BABC

clintonopah:
yea...its quite aligned...tho....but I wasn't in the place to change the answer given to me

so we should now believe those answers?
because you cant change them?

clintonopah:
1)________gas ll be in passive state with nitogen(II)oxide and lll alwaz rekindle a glowing splinter wen ignited
a)N20
b)02
c)H2
d)03

2)The major cause of explosion in coal mines is combusion of
a)Paraffins
b)Alkene
c)alkyne
d)Olivine

3)_______is d major reason y gravity (g) varies from place to place
a)The earth nt being a perfect sphere
b)The earth. being well spherical
c)change in mass
d)change in chemical balance reading

4)________is a scaler quantity
a)Flux
b)Flux linkage
c)Gravitaional field
d)Momentum

5)Eureka means
a)Displacement
b)I found it
c)Displacement can
d)Irregular solid

6)The most sensitive part of d eye is
a)black spot
b)yellow spot
c)Blind spot
d)White spot

7)________law is an example of inverse sqaure law
a)Brewsters law
b)malus law
c)Light illuminance law
d)kirchoff's law

)________reagent is used as a final test for S04 '2-
a)Bacl2
b)AgN03
c)HCl
d)FeSO4


9)_________exist as aggregate ions
a)NH3
b)NH4'+
c)NaCl
d)Cr07'-

10)_______has a duplet structure
a)Sulphur
b)Argon
c)Oxygen
d)Helium

11)_______is mostly positive
a)
b)potassium
c)florine
d)Caesum

* clintonopah :
okay...heres the answer BBDABDACCCB *

HAha big bro some of your answers are
WRONG.

1you mean oxygen is passive to Nitrogen I oxide.??
2you mean alkanes (paraffin eg METHANE ) no longer cause explosion??
3so the variation of gravity is no longer caused by the uneven shape of the earth
6.so yellow spot is no longer the most sensitive part of the eyes
7. so Brewster law n= tan tita now obey inverse square law.??
8 BaCL nko? no longer used??
10, helium has a duplet structure na
11. caesium is more positive than potassium joor.

clintonopah wow. do post the solution and explain.

clintonopah:
1)________gas ll be in passive state with nitogen(II)oxide and lll alwaz rekindle a glowing splinter wen ignited
a)N20
b)02
c)H2
d)03

2)The major cause of explosion in coal mines is combusion of
a)Paraffins
b)Alkene
c)alkyne
d)Olivine

3)_______is d major reason y gravity (g) varies from place to place
a)The earth nt being a perfect sphere
b)The earth. being well spherical
c)change in mass
d)change in chemical balance reading

4)________is a scaler quantity
a)Flux
b)Flux linkage
c)Gravitaional field
d)Momentum

5)Eureka means
a)Displacement
b)I found it
c)Displacement can
d)Irregular solid

6)The most sensitive part of d eye is
a)black spot
b)yellow spot
c)Blind spot
d)White spot

7)________law is an example of inverse sqaure law
a)Brewsters law
b)malus law
c)Light illuminance law
d)kirchoff's law

)________reagent is used as a final test for S04 '2-
a)Bacl2
b)AgN03
c)HCl
d)FeSO4


9)_________exist as aggregate ions
a)NH3
b)NH4'+
c)NaCl
d)Cr07'-

10)_______has a duplet structure
a)Sulphur
b)Argon
c)Oxygen
d)Helium

11)_______is mostly positive
a)Robidum
b)potassium
c)florine
d)Caesum

AAADCBDACCD

McHenry99:
The neck region of the tape worm, (teania) is responsible for the

A. production of egg


B. storage of egg


C. formation of new segment


D. development of the suckers


E. fragmentaion of the body segment



View Explanation

Question No:22

Which of these is not true of the insect? The possession of

A. two pairs of antennae


B. jointed appendages


C. exoskeleton


D. three pairs of legs


E. segmented body



View Explanation

Question No:23

Rhizopus (or mucor)obtain its food from dead organic matter extracellularly. It is said to be

A. a facultative parasite


B. saprophyte


C. an obligate parasite


D. a commensal


E. an autotroph



View Explanation

Question No:24

The feature that distinguish the toad or frog from the fish is the absence of

A. scales


B. lungs


C. paired appendages


D. a tail


E. skin glands



View Explanation

Question No:25

Which of these is not associated with tadpole stages of toad or frog

A. V-shaped gland


B. operculum


C. external gills


D. jelly


E. shell

CABAB

HMM RIP

clintonopah:
the heat loss is being regulated... so the pressure is high and constant....causing decrease in boiling point

hmmm.
how does increase in pressure decreases boiling point pls explain.

lordkvng:
which of the following will crack on freezing

a)thin glass
b)thick glass
c)both

yeah thick glass.
because of uneven contractions

lordkvng:
the resistance of ______ will decrease when it is heated

a)constantan
b)thermistor
c)tungsten
d)iron

thermistor i think.
because it is formed from semi conductors

NICE THREAD

#following.

IamTobie:
Medwhite, I hope u a science student. Medwhite, I hope u a science student.

yes sir.

McHenry99:
Which is the largest of the middle ear ossicles?
a. anvil b. Stipe c. Hammer d. Incus


the process by which plants and animals are modified by structure, physiology and behavior in order to survive is known as a. Evolution b. Adaption c. succession d. aggression


which of these plants can withstand extreme dryness? a. cactus b. raphia Palm c. triplochiton scleroxylon d. parkia biglobosa


Animals that do not allow their body temperature to vary with the ambient are called? a. homoiothermic b. poikiolotherm c. amphibians d. Reptiles


which of the following is not a water soluble vitamin a. thiamine b. riboflavin c. folic acid d. calciferol


which of the following hormone is primarily responsible for the contractions during labour
a. oxytocin b. Oestrogen c. Progesterone d. prolactin


which of the following give rise to the skin
a. ectoderm b. mesoderm c. ensoderm d. none


understorey plants in a temperate forest have adaptations to capture limited......
a. water
b. nutrients
c. heat
d. sunlight

C
A
A
A
D
A
D
D

lordkvng:
volume =1.0*0.6*0.4 =0.24m^3... density =mass/volume..... mass=volume * density..... mass=0.24*8000.... mass=1920kg.... pressure=force/area... and force=weight... therefore weight = 1920*10N.... weight=19200....
maximum pressure = 19200÷0.6*0.4.... maximum pressure =80000N/m^2....
minimum pressure =force/area.... minimum pressure = 19200÷1*0.6.... minimum pressure = 32000N/m^2....

Cc medwhite0

thanks boss.

lordkvng:
medwhite0 I believe you'd love this question

1) a rectangular solid iron Block has sides 1.0m×O.6m×0.4m and rests on a horizontal surface. if the density of iron is 8000kg/m^3, calculate the maximum and minimum pressure which the Block can exert on the surface. (10N=weight of 1kg mass)

pressure = d H g

pressure = 8000*1*10
= 80000n/m2.

modified
i was wrong

H is 0.4 not 1

lordkvng:
your number 71 is wrong, sucrose is not a reducing sugar, there fore it has no effect on fehlings solution... check your chemistry textbook well

boss it has a positive effect when warmed.

clintonopah:
18...

tell me the two questions i missed.

thanks.

medwhite0:
C A C C B D B B C A C A A C A C D C D B

cc: clintonopah

clintonopah:
52. When heat is applied to one end of a metal
rod, the molecules at the other end soon begin to
vibrate with greater amplitude than before
because heat has been transferred by A.
Radiation B. Convection C. Conduction D.
insulation

53. The plane mirrors in a kaleidoscope
are usually placed. A. at an angle of 60 degrees
B. Parallel to one another C. perpendicular to one
another D. at an angle of 45 degree

54. Which of
the following statement explains why
tetraoxosulphate (VI) acid is regard as a strong
acid? A. the acid is concentrated B. The acid id
highly corrosive C. the acid is completely ionized
D. tetraoxosulphate (VI) ions are very reactive

55.
Which of the following is not correct of glucose
and fructose? A. they are structural isomers B.
they reduce Fehling’s solution C. they can be
obtained by the hydrolysis of starch D. they are
readily fermented by enzyme

56. Which of the
following is normally used for drying ammonia
gas? A. concentrated tetraoxosulphate (VI) acid
B. calcium oxide C. anhydrous calcium chloride
D. phosphorus (V) oxide

57. nuclear reactions can
be used in the following except A. gauging the
thickness of objects B. making atomic bombs C.
generation of electricity D. purifying water

58.
The following metals are extracted by the
electrolytic method except A. potassium B. tin C.
calcium D. magnesium

59. PMS (petrol) can be
obtained from AGO (diesel) by A. distillation B.
cracking C. catalysis D. polymerization

60. The
separation of a mixture of calcium
trioxocarbonate (IV) and sodium trioxocarbonate
(IV) is most easily carried out by using the
differences in their A. physical states B. melting
point C. solubility D. boiling point

61. What is the
amount (in mole) of sodium trioxocarbonate (IV)
in 5.3g of the compound? (Na = 23; C = 12; O =
16) A. 0.05 B. 0.10 C. 0.50 D. 0.20

62. Brass is
an alloy of A. copper and iron B. copper and
chromium C. copper and zinc D. copper and
magnesium

63. The products of the electrolysis
of dilute sodium chloride solution with platinum
electrodes are A. hydrogen and oxygen B. Oxygen
and chlorine C. oxygen and water D. chlorine and
water

64. When starch undergoes complete
enzyme-catalyzed hydrolysis, the resulting
product is A. Glucose B. maltose C. sucrose D.
fructose

65. Which of the following is not a direct
petroleum product? A. ethanol B. methane C.
Vaseline D. kerosene

66. Which of the following
properties is not characteristic of electrovalent
compound? A. formation of crystalline solids B.
solubility in polar solvents C. high vapor
pressures D. high melting and boiling points.

67.
Compound that have the same molecular formula
but different structures are said to be A.
Allotropic B. Polymeric C. Isomeric D. isotopic

68.
Water from a river contaminated by sodium
hydroxide waste will have a PH of about A. L B. 3
C. 7 D. 9

69. Which of the following is suitable
for determining different isotopes present in an
element which exhibits isotropy? A. isotopic
counter B. cathode ray tube C. mass
spectrometer D. Geiger Muller counter

70. When
iron rusts, it undergoes A. deliquescence B.
chemical decomposition C. Hydrolysis D. redox
reaction

71. When sucrose is warmed with
Fehling’s solution A. the solution turns milky B. A
brick –red precipitate is formed C. There is no
precipitate D. a blue-black coloration is produced

C
A
C
C
B
D
B
B
C
A
C
A
A
C
A
C
D
C
D
B

double post.

lordkvng:
1)what electromagnetic wave has the highest frequency 2)How can electromagnetic waves be differentiated 3)what electromagnetic wave has the highest wavelength 4)what electromagnetic magnetic wave is used to dry paints 5)what electromagnetic wave is used to check for cracks in metal castings. 6)what do all electromagnetic waves have in common
Goodmorning bro.. lol Morning gift

hmm! 1. gamma ray 2. they have different frequency &wavelength but same speed. 3. radio waves 4.dunno... xray or infrared ray i guess. 5.gamma ray. 6. speed of light.

lordkvng:
medwhite0.. How will u calculate coefficient of friction from that your formula

every question has different interpretation.

well, U= tan tita.

lordkvng:
. Correct except number 2

depolarizer is a oxidising agent. MnO2 is used bro.

lordkvng:
1) polarization in Daniel cell is caused by?
2) depolarizer in Daniel cell is?
3) the cathode and anode respectively in Daniel cell is?

1.hydrogen/mercury
2.MnO2
3. cathode Copper Anode ZINC.

lordkvng:
lol...c(coefficient of friction ) = Tan 0...you agree Yea? So if C=0.5, Then the angle will be Tan^-1 (0.5)

NO. tan-1 (0.5) is not 30.
just solve it this way.
F= mgSIN tita
20= 4*10* sin tita tita= sin -1 (20/40) tita= sin-1(0.50) tita= 30°